Dear, I have an atypical situation.
With the change of daylight saving time one of the rac nodes had the time changed for 5 years ahead. The time stayed for a few seconds and did not have a node restart but the tablespace undo is with segments with begin time and end time for the year 2025. I can not release the space used. Would you have any alternative for cleaning?

thankful
Ricardo

select to_char(begin_time, 'DD-MON-RR HH24:MI') begin_time,
to_char(end_time, 'DD-MON-RR HH24:MI') end_time, tuned_undoretention
from v$undostat order by end_time;


Begin Time              End time               UNDOTSN  UNDOBLKS    TXNCOUNT    MAXCON
10/21/2025 00:44:26 10/21/2025 00:45:34 2 255234254 432238549 44
10/21/2025 00:34:26 10/21/2025 00:44:26 2 2665 3605 7
10/16/2025 23:54:26 10/21/2025 00:34:26 2 0 0 0